Prediction and prevention of swallowing dysfunction after curative (chemo)-radiation in head and neck cancer
The aim of the first part of the project was to determine which factors, including the dose distributions in swallowing organs at risk (SWALSTRUCTs) predict post-treatment swallowing dysfunction. The plan was to perform a prospective cohort study in which 240 patients had to be included. Dose volume histograms (DVH’s) of the SWALSTRUCTs and other potential determinants, as well as a number of objective (e.g. videofluoroscopy (VF)) and subjective measures of swallowing dysfunction will be assessed before, during and after treatment. Based on the findings of this study, a predictive model will be developed and subsequently validated in a second cohort of patients. We planned to include 240 patients in the prospective cohort study (STAP) and 144 patients in the prospective study (invasive part) including also VF and CT (SWAP) to assess the patho-physiological mechanisms of swallowing problems and to provide information for the prospective swallowing exercise program (PSEP).
Part 2 of this project aims to develop preventive strategies: swallowing sparing IMRT and a preventive exercise program.
The predictive model will be used to define which anatomical structures should be considered relevant Swallowing Organs at Risk (SWAOARs) and which dose constraints for the SWOAR’s should be used for in swallowing sparing IMRT (SS-IMRT). SS-IMRT will be developed by using these dose constraints and the SS-IMRT plans will be compared to the standard IMRT plans to estimate the potential benefit of this new technique on the individual as well as the group level. Based on this planning comparative study, we will develop a new radiation protocol that will be validated in PART 3.
The findings obtained by VF will be used to develop a Preventive Swallowing Exercise Program (PSEP) for those subjects that remain at high risk for swallowing dysfunction.
In the last part of the study, the potential benefit of SS-IMRT will be tested in a prospective cohort study.
Funding
Dutch Cancer Society (KWF Kankerbestrijding), 2008-2012.
Staff
PhD students
M. Christianen, MD, UMCG
K. Wopken, MD, UMCG
M.J. de Bruijn, MA, Linguist, VUmc.
Project leaders
Prof J.A. Langendijk, PhD MD, Radiotherapist-oncologist, dpt. Radiotherapy, University Medical Center Groningen (UMCG)
Prof I.M. Verdonck-de Leeuw, PhD, Psychologist, Speech and Language Therapist, Linguïst, dpt. Otolaryngology-Head&Neck Surgery, VUmc.
Project members
Members of the Head and Neck Cancer Working Groups of UMCG and VUmc.
Questions?
For questions, please contact:
Prof J.A. Langendijk, PhD MD, Radiotherapist-oncologist, dpt. Radiotherapy, University Medical Center Groningen (UMCG)
Email: j.a.langendijk@umcg.nl
or
Prof I.M. Verdonck-de Leeuw, PhD, Psychologist, Speech and Language Therapist, Linguïst, dpt. Otolaryngology-Head&Neck Surgery, VUmc.
Email: im.verdonck@vumc.nl










